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Nov. 15, 192 7. 1,648,913

J. M. RATHMELL ROAD MAKI NG MACHINE Filed Aug. 28, 1924 IO SheetS-Sheet 1 Nov. 15, 1927.

J. M. RATHMELL.

ROAD MAKING MACHINE Filed Aug. 28, 1924 10 Sheets-Sheet 2 Nov. 15, 1927. 1,648,913

J. M. RATHMELL ROAD MAKI NG MACHINE Filed Aug. 28, 1924 10 Sheets-Sheet 3 1 'IIIIIIIIA Nov. 15, 1927.

J. M. RATHMELL ROAD MAKING MACHINE Filed A1121. 28, 1924 10 Sheets-Sheet 4 lllllllllllllllllh 1 N J rm? hwu mw J. @111... nt I. n

Nov. 15, 1927. 1,648,913

J. M. RATHMELL ROAD MAKING MACHINE Filed Aug. 28, 1924 10 Sheets-Sheet 5 Ill!" lllll Nov. 15, 1927. j 1,648,913

J..M. RATHMELL ROAD MAXI NG MACHINE Filed Aug. 28, 1924 1Q Sheets-Sheet 6' 10 Sheets-Sheet 7 Nov. 15, 1927. 1,648,913

J. M. RATHMELL ROAD MAK ING MACHINE Fil'ed Aug. 28. 1924 10 Sheets-Sheet 8 Nov. 15, 1927. 1,648,913

- J. M. RATHMELL ROAD MAKING MACHINE Filed Aug. 28, 1924 10 Sheets-Sheet 9 Nov. 15, 192 7.

J- M. RATHMELL ROAD MAKING MACHINE Filed Aug. 28, 1924 10 Sheets-Sheet 10 Patented Nov. 15, 1927.

UNITED STATES PATENT OFFICE.

JOHN M. RATHMELL, OF CONNEAUT, OHIO, ASSIGNOR TO DUNN ROAD MACHINERY a COIVIPANY. OF CONNEA'UT, OHIO.

ROAD-JVIAKING MACHINE.

Application filed August 28, 1924.

This invention relates to road making machines, for laying concrete pavements, of the type shown in U. S. Patent No. 1,265,499, issued to Allan J. Parish May 7, 1918, and U. S. Patent No. 1,447,999, issued on my application March 13, 1923.

The object of my present invention is to provide in such a machine a strike-olf bar which can be raised and lowered, and which is provided with power actuated means to impart positive longitudinal reciprocation for said strike-off.

Another object of this invention is to pro vide in such a machine, tainping mechanism which will have positive vertical reciprocation, and provided with means whereby the limits of the vertical reciprocation of said tamping device can be raised or lowered as desired.

Another object of this invention is to provide in such a machine a mechanism adapted to trowel finish the surface of the concrete.

These and other features of my invention will be hereinafter fully described and pointed out, and are illustrated in the accompanying drawings in which viz:

Figure 1 is a plan view of the road making machine embodying my invention.

Figure 2 is a front elevation of the same.

Figure 3 is an end elevation of the same.

Figure 1 is a f agmentary front view of the crank and clutch mechanism for reciprocating the strike-off plate.

Figure 5 is a side elevation of the same.

Figure 6 is a fragmentary front view of the crank and clutch mechanism for reciprocating the finishing trowel.

Figure 7 is a side elevation of the same.

Figure 8 is a side elevation of the main transmission gear of this machine.

Figure 9 is a plan view of the same.

Figure 10 is a side elevation of the chain transmission of this machine.

Figure 11 is a fragmentary side elevation of the tamper mechanism of my invention.

Figure 12 is a side elevation of a portion of the adjusting lever.

Figure 13 is a sectional view of the adjusting mechanism on the line 13-18 in Fig. 1.

Figure 14 is a plan view of the hand-wheel mechanism for lifting the strike-off plate.

15 is a side elevation of the same- Serial No. 734,694.

Figure 16 is a front elevation thereof.

Figure 17 is a vertical longitudinal section of the differential clutch mechanism for operating the traction drive shafts.

Figure 18 is a side elevation of the same showing both sides thereof opened.

Figure 19 is a side elevation of one of the hinged brackets.

In these drawings A indicates the usual side forms for the pavement, upon which the machine travels as hereafter described, and between which the concrete is laid.

A indicates the traction wheels upon which the end frai'nes A of the machine are mounted.

The end frames A are tied together by means of a frame consisting of transverse beams B and end beams B which are secured together by means of castings B the ends of which project under the side frames A to which said castings are secured by means of bolts Z). The frames A and B, B are similar in construction to the frame of the machine shown in the Letters Patent heretofore mentioned, and therefore form no part of this invention.

The traction wheels A at each end of the machine are connected by means of sprocket wheels a and a chain a, see Fig. 3, so that said wheels at each end of the machine will revolve in unison and the motive power of the machine is applied to both.

Mounted on the machine frame is a traction driving shaft C which isdivided. and is provided with a double faced clutch C, see Figs. 17 and 18.

In this clutch, a sprocket wheel C is ro tatably mounted upon and overlaps the meeting ends of the shaft C where it is held in place by means of collars (n secured on said shafts by means of set screws 0. The hub of the sprocket wheel C" is recessed to re eeive the collars cc and the annular edges of the hub are cut away to form clutch shoulders c as shown in Fig. 18.

Slidably mounted on the shafts C at each side of the sprocket wheel are clutch sleeves C the shafts C being provided with keys 0 to prevent said sleeves from rotating upon said shaft.

The sleeves are provided with clutch shoulders 0 adapted to engage the shoulders en tub of the sprocket wh -i 3 1 The sleeves C are adapted to be independently operated hy the levers C and C. see Figs. 1 and 2. the right hand lever controlling the right hand portion of the divided traction shaft C and the left hand lever C controlling the left. hand portion of said shaft, so that when it hoconies desirahle to advance one end of the machine with relation to the opposite end, one or the other lever C U can he used as desired.

The on ter ends of the divided shaft C are provided with sprocket wheels: 0". and upon the shaft of tIfiCelOll wheel A at each end of the machine is placed sprocket wheel. A said sprocket wheels (3" and carrying chains 1r see Figs. 1 and 3, so that power from the traction shaft C is cni'iinn iicated to the tour traction wheels A oi? the H12.- chine.

I provide a reversing transmission gear D. see Figs. 8 and 9. which composed of a pair of shafts D and D. nrnntxd in suitahle hearings. The shaft D is provided with a sprocket wheel (Z by means of which power applied to the shaft D. Upon the shaft D are placed spong -1r wheels D and D", each of said wheels being provided with clutch. collars d and (Z said wheels being rotatable upon the shatt D.

Between the clutch collars (Z and (Z there is a slidahle clutch sleeve if. which is non rotatable on the shaft D by reason of the hey a so that the clutch can he sli:.l on the shaft D so to cause either spnr-wheel D" or D to rotate with the shaft D.

Mounted upon a stud-shaft E is an idler spur gear wheel E which meshes with the spur wheel D as shown by broken lines in Fifi. 8.

Upon the shaft 1'), see Fig. 9, is fixed a spnrovhcel E which meshes with the spnrwheel D There another spur-wheel 1E" iifittl on the shaft D which meshes with the idler spur-wheel ll. so that when the clinch sleeve D is engaging with the wheel D- the shaiit and spur-wheel l5 will revolve in the some (.lirection as does the shaft it). with spur-wheel l3 revolving freelv on the shatt l). and when the clutch sleeve if is slid into cnga ement with the gear pinion D. the near spur D will revolve freely on the shaftv D" and the shaft i} will turn in a directioi'i opposite to the shaft D.

On the shaft.- ID see Fig. 9. is iii-zed a sprocket wheel Eh from which a chain F". see 10, extends aronnd the sprocket wheel C see Figs. 1. 1'? and 18. hv means of which chain the traction shaft C is driven.

Mounted in the machine is a tamper shat-t. F. see Figs. 1. 2 and 10, noon which are placed tamper operating eccentrics F, see Figs. 1. 2 and 11.

Upon the tamper shaft F is a friction clutch mechanism F of ordinary construction. which is provided with a sprocket wheel 7. upon which it oh n f" placed which enends over a ll wheel f onv the shaft t 01' the motor G.

tipon he huh oil the friction clutch mccln anisin 3" there is also another sprocketwhecl f and over this wheel and the sprochct wheel. on the shaft D. see f), a chain f placed, so that power will he c nininnicatcd from the ca q ine Fldt'l l, G to the tamper shalt hy the chain f. and from the tamper it to the transmission shaft l/ by the chain 7''". see Fig. 10, and from the transmission D. see F t). to the divided trac ion-shaft C hy the chain l see Big. 10.

t or operating the clutch sleeve D a lever D. see Figs. .1 and F3, is provided, by means oi. which the power transmitted to the traction shaft can. be controlled to cause the Inachine to travel torward or backward on the side forms ii. as may he desired, the gears oi the transin' on see Figs. 8 and. 9 be ing so proportioned that the hachward travel of the machine will he taster than its on ward travel.

The mechanism hereinhctorc descrihet'i designed tor the purpose of conveying; and opera ting the sti'ilteptli'. taniping andv linish inc mechanisms of my invention hereinafter dcscrihcd. viz:

The s ii Use 0 77".

ll. indicates a strike-oil" her which snspended in front of the machine upon rock- Hliit'fi'fi El. see Figs. 1 and 2. nii'ninted upon the side heains If. by means of criinl: arms 71, and link bars 71,.

The rock-shafts H are provided with crank arnis H to which rods Eli." are pivoted. which extend to hand-wheel mechanism 5. sec llio's. 14-, 15. and ill. in which they Hiu pivoted to the ends ot a cross lever 71, which is tired npon a vertical sha mountedv in :2 snitahlc iranic ill which hcanis of the machine in.

watt ii an he operated to lift the strike-ed ha r ll: when desired. in order to retain the strike-off har in a raised position a ratchet scgrincni. 71; is lined upon the vertical shaft it and a. ratchet lever /i" is pi voted n the l'raine it adapted to engage the rat het segment to retain the segment and i 'iwih har H in its raised position.

support the strike ott har til anain t the forword thrust oi the machine. hiijigie brackets 3 see Fig. 19. are PlOVlCli-t'l. which are pivoted to the rear side of the striheo l hair i: h v means of pivot pins whirh are long enough to permit the strike-oh plate to slide vertii'rally thereon.

The rear ends of the hinge-brackets J are pivoted to ears J secured upon a heani of the machine frame, by means of pivot pins j. The hinge-brackets .l permit the strike oft bar H to be reciprocated longitudinally as hereinafter described.

The tamper.

Sehind the strike-off bar H is placed a vert' tally reciprocating tamping bar K, see Figs. 3 and 11, which is suspended upon the free ends of oscillatory levers If. The levers 1', see Fig. ll, are fulcrumed upon eccentrics K which are rotatably mounted upon stud-shafts K secured in the supporting brackets of the traction shaft C. Secured upon the eccentrics F on the tamper shaft F are eccentric straps F from which arms F extend and are pivoted to the lever K.

Temper m'Zulsfi n 722 cc]? am'sm.

The eccentrics K? are each rovided with an arm K, to which a link-bar is pivoted.

Rotatably mounted on the machine frame is a shaft in which extends longitudinally under all of the oscillatory levers li. Adjacent to each of the eccentrics K an arm A" is fixed upon the shaft 2-, which arm 7r is pivoted to the link-bar K.

For operating the eccentric K an arm is fixed upon the shaft It, at the intermediate portion thereof, to which a link-bar 7a is pivoted which extends to an operating lever v to which it is pivoted. The lever is fulcrumed upon a bracket 70 which is pro vided with a notched segment K, see Fig. 12, with which a latch k engages.

The lever 70* can be operated to rock the eccentric. K upon the stud-shaft K changing the position of the lever K from its position shown in full lines in Fig. 11, to the position shown in broken lines, thus raising the tamper K as shown in broken lines, the lever 0*, through the shaft in operating all of the eccentrics K in unison, while the rotation of the eccentrics F continues the vertical reciprocation of the tamper bar K. The tamper bar K is secured upon vertical screw-threadcd rods. see Fig. 11. upon which is placed a spring L which is held upward thereon by means of a nut if so that said spring presses against the lever K. so that the downward pressure of the lever K upon the tamper K will he cushioned by the spring L A link bar if is pivoted to the tamper K and to a beam l3 ol' the machii'ie frame to prevent lateral movement of the tamper.

The finisliz'nyi trowel.

Behind the tamper bar is suspended a finishing bar or trowel, l\[ which is provided with parallel links m adapted to draw it forwardly as the machine travels ahead, and which parallel links m operate to maintain the finishing bar M in an upright position, see Figs. 3 and 7. To lift the finishing bar M upward, clear of the work, cables l are attached thereto, which cables M pass over pulleys m see Figs. 1 and 2, and lead to a indlass mechanism M which is provided with a hand wheel, see Figs. 1 and 2. by means of which said finishing bar M can be raised when desired. The finishing bar M. being suspended upon the cable if. and parallel links. or, is free to receive horizontal reciprocation by means of the mechanism hereinafter described.

771a finishing 2367/.

For the purpose of smoothing the surface of the concrete, a fabric belt N is provided which is stretched upon a frame N slidably supported upon brackets N secured upon the side beams A of the machine. This belt N is caused to reciprocate longitudinally as the machine moves forward, and is provided with an arm N from which a bar N extends forward to the frame N where it passes through a slotted bracket it so that by pullhis the bar N forward the frame N and belt N can be turned upward clear from the work.

Reciprocating mechanism.

'lransverscly mounted upon the frame of the machine is a shaft, 0, see Figs. 1, 5, 6 and 7. upon which is fixed a mitre gear, 0 which meshes with a like gear 0 on the shaft 1) of the transmission gear D, see Fig. 0, and on the front end of the shaft 0, is secured a crank O upon which a pitnian O is placed, which extends and is pivoted to the strike-oil bar H, see Figs. 1 and 2.

A clutch mechanisn'i P, see Fig. 5, is provided, by means of which the revolution of the crank O can'bo stopped. A lever P is provided for opening said clutch, which lever is operated by raisingthe strike-off bar upwardly until the inverted U-rod, p. engages the lever P and opens the clutch. A spring; p is provided to close the clutch when the strike-olf bar is lowered.

Upon the transverse shaft 0 is lixed a spur gear Q, see Figs. 1, G and 7, and mounted in suitable hearings on the machine frame parallel with the shaft 0, is a crank-shaft Q. havine; a crank thereon upon which a pitman Q." is placed, which extends and is pivoted to the finishing; har M. A spur wheel Q, on the crank shaft Q meshes with the spur wheel Q. on the shaft 0.

A clutch Q see Fig. 7, is provided, with an operating lever Q, adapted to be engaged by the finishing bar l\[, when the same is raised clear from the work, as described, to open the clutch Q to stop the reciprocation of said bar.

Upon the rear end of the transverse shaft 0 is placed a crank R upon which a pitman R is placed which is rotatably secured to the belt frame N. A clutch R is provided on the shaft O, which has an operating lever,

Sill

a, l anc 3. slotted bar is piv oted t the clutch lever and to the bar ll so that when the belt ll is raised from the work, the bar R will operate the lever B to open the clutch and thereby stop the reciprocation of the belt.

in operation the space between the side forms A is filled with wet concrete. The motor G is sailed. The strike off plate if is lowered upon the side forms. The 'liniSl1- ing bar lu'l is lowewd upon the side forms. The clutch mechai an IE is closed to cause the tamper shaft i to rotate and the tamper K to reciprocate vertically, The lever D is then operated to cause the transmission gear mechanism D to move the machine forward. The shaft 0 is now 'ausing the strilreol'l H, the finishing bar M to reciprocate longitudinally, which scrapes the mass of concrete between the side forms it to the desired contour, which is tamped down by the verticall reciprocating tamper har K, and the surface troWellcd otl' smoothly by the longitudinally reciprocating bar M being drawn over it by the advancing machine, During this operation, if it is desired the surfacing; belt N can be lowered upon, the concrete, and the clutch n will close thereby causing said belt to cormnence its reciprocation as it contacts with the concrete while it is being carried forward over the same.

If it is necessary to hack the machine up, the belt N is raised which stops its reciprocation. The smoothing bar M is raised and its reciprocation stopped. Likewise the strikeoff bar H. he traction shaft C stopped.

The camping shaft should. he stopped in its rotation by the opening of the clutch F with the tamper K in its raised position. For this purpose, and to counterbalance the weight of the tamper K, COlllltQI'v weighted wheels S are provided on the shaft F, which can be grasped and the shaft F revolved manually until the tamper is raised clear from the work, when the lever L can be operated to reverse the travel of the machine.

l'laving; thus fully described the construction of a machine embodying my invention so that others can utilize the same, I am aware that many modifications can be made therein without departing from the scope of my invention.

Therefore, what l claim as new and deso are by Letters l atent is:

l. in a machine of the class described, a strkc-ofl bar, means to raise and lo ver said bar, a shaft, a. clutch on said shaft, a crank operated lay said clutch, a pitman mounted on said crank and pivoted on said strikeoff her, a hell-crank-lever to open and cl so said clutch, and means on said StllliQ-Ofi bar to engage said hell-cranlrdever and open said clutch when said strike-off-baii' raised.

2. In a machine of the class described, a machine frame, rock-shafts mounted on said frame, lever aais on said rock shafts, a strikc-o -liiar, linlcs pivord on .aid lever 1 a 1', a hand wheel hand wheel shaft,

or in to salt strike shalt, a cross-liar said link-rods pivoted on s if. cross-bar and to lever arms on said roclcshafts, and ratchet and dog, n'ic-chanisin to prevent backward movement of said hand wheel shaft.

53. In a machine of the class described, a travelling machine frame, longitudinally swinging; brackets pivotedon said frame, vertical pivot pins in the free ends of said brackets, 21 strilIc-oili bar vertically slidahle on said pivot pins, manually operated means to raise and lower saic. strikeolf bar on said pivot pins, and mechanism to impart longitudinal reciprocation to said strike-off bar.

i. In a machine of the class described, a vertically shiftable fulcrum, a lever mounted on said fulcrum, crank and pitman mechanism adapted to oscillate said lever, and a tamper sus ended on said oscillatory lever.

In a. machine of the class described, an eccentric mounted on said machine, lever and link nticchanism to shift said eccentric, an oscillatory lever fulcrumed on said eccentric, shaft and eccentric mechanism to oscillate said lever and a tamper bar suspended from the free end of said lever.

(i. In a machine of the class described, a series of eccentric fulcrum pivots mounted in said machine in horizontal alignment, lever, link and. shaft mechanism :idaptcd to shift said eccentric fulcrum pivots in unison, a series of lovers mounted on said fulcrum pivots, shaft and eccentric mechanism to oscillzuie said lovers in unison, and a tamper bar suspended on the free end of said lever.

ln lestin'iony whereof I allir; my signature.

JOHN llilflfllliHELL.

lit) 

